The story
So called due to its frequent use in Michigan.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: An intersection design in which (for countries that drive on the right) left turns are not allowed and vehicles instead proceed past the intersection, make a U-turn, and then make a right turn; the 'turn' made at such an intersection. Full definition →
So called due to its frequent use in Michigan.
Etymology from Wiktionary, CC BY-SA 4.0.